Remove openbao helper and replace it with more general program

This gets rid of the messy nix code for handling bitwarden
secrets, and unifies it all into a nice single program
in rust. Ensuring that only the needed secrets are loaded.

rust/program/infrastructure/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "infrastructure"
+edition = "2024"
+version = "1.0.0"
+metadata.crane.name = "infrastructure"
+
+[dependencies]
+anyhow = { workspace = true }
+clap = { workspace = true }
+common = { path = "../../lib/common" }
+log = { workspace = true }
+nix = { workspace = true, features = ["env", "process"] }
+serde = { workspace = true }
+serde_json = { workspace = true }
+hakari = { version = "0.1", path = "../../lib/hakari" }